Jane Muthoni Mara said she felt "completely and utterly violated" after sexual torture.
She is demanding compensation for her suffering.
Jane said: "I want the British citizens of today to know what their forefathers did to me and to so many others. These crimes cannot go unpunished and forgotten."
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HMS Enterprise assisted with saving more than 6,500 migrants off the coast of Libya on Tuesday.
Abu Muhammad Al-Adnani, cited as so-called Islamic State's official spokesman, was reported as killed in Syria by the group's media branch.
More cloud tomorrow with showery bursts of rain sliding southwards and eastwards through England and Wales.